Effective Controller Design for the Dynamic Voltage Restorer (DVR) for Voltage Sag Mitigation in Distribution Utilities
نویسندگان
چکیده
The voltage sag detection algorithm and control algorithm synthesis of the dynamic voltage restorer (DVR) are proposed. The double synchronous reference frame phase-locked loop (DSRF-PLL) is applied for the voltage sag detection, which is able to calculate the phase angle of the positive-sequence fundamental component of grid voltages even under unbalanced and distorted grid voltages. The effective control strategy of the DVR is proposed, which includes the reference compensation voltage generation, the control scheme for the shunconnected voltage source converter (VSC) and the control algorithm for the series-connected voltage source inverter (VSI). Finally, extensive simulation results are presented to verify the validity and effectiveness of the proposed control strategy.
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